Question

Which of the following statements are true? Justify your answers. (This means that if you think a statement is false, give a short proof or an example that shows it is false. If it is true, give a short proof for saying so. For instance, to show that ‘{1, padma, blue} is a set’ is true, you need to say that this is true because it is a well-defined collection of 3 objects.)
i) Eliminating z from equation, equation and equation gives equation.
ii) The roots of equation are given by equation.
iii) equation.
iv) Given any n positive numbers in equation, the product of their harmonic mean and their arithmetic mean is 1.
v) If A and B are two sets such that equation is empty, then either equation or equation.
vi) For any equation.
vii) The geometrical representation of the set equation is a point.
viii) Any finite set is a subset of equation.
ix) Every biquadratic equation has at least one real root.
x) The converse of the statement, ‘Every student of MTE-04 has completed FST-01’, is ‘Every student of FST-01 has completed MTE-04’.

09 Jan 2026
Answer :
Word Count : 354
i) False. Eliminating a variable from multiple equations does not always produce the same resulting equation; it depends on the specific equations. Counterexample: Equations: (x + y + z = 3) and (x - y + z = 1). Eliminating (z) gives (2y = 2 \implies y = 1), not a single equation in the form “equation”. ii) True. The roots of a quadratic equation (ax^2 + bx + c =
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